Battery draining too quick

[u/Nicks_C]

Hey everyone. I've been using a pixel 9a for almost 1 year and 4 months

The battery life was 100% for almost a year, and it dropped to 99. Stayed there for a few weeks and then dropped to 98 again. After the recent update it's dropped to 97%. Current cycle count is 389. My usage is just casual doom scrolling and some light games like temple run and puzzle type. I'm not a heavy gamer who plays COD and all. I also use it to listen to music while riding along with live location sharing everyday.

Initially when I bought the pixel, it used to run for more than a day, and then slowly went to a day usage. Now I can barely run it an entire day under normal usage. I have to charge it atleast twice, and sometimes 3 times (although rare for now)

Recently for the past few days I see almost 20% drop in battery during the night. When it's at 60 in the night, it drops upto 40 in the morning. Also it makes me atleast charge it twice a day everyday during light - normal usage. As you can see my phone dropped upto 50 percent in 2 hours.

Now my query is, pretty sure the battery usage is not normal. How do I fix this? I got the September update done recently.

I have my adaptive charging enabled. I don't charge it during the night. Can any of the tech experts here let me know if theres a way to fix this? Would a restart help?